關閉標題：simpleEncode
內容：

js:

function simpleDecode(data) {
    const key = 0x5A;

    let bytes = Uint8Array.from(atob(data), c => c.charCodeAt(0));

    for (let i = 0; i < bytes.length; i++)
        bytes[i] ^= key;

    return new TextDecoder().decode(bytes);
}

function simpleEncode(text) {
    const key = 0x5A;

    let bytes = new TextEncoder().encode(text);

    for (let i = 0; i < bytes.length; i++)
        bytes[i] ^= key;

    return btoa(String.fromCharCode(...bytes));
}


C#:
public string simpleEncode(string data)
{
    byte key = 0x5A;

    byte[] bytes = Encoding.UTF8.GetBytes(data);

    for (int i = 0; i < bytes.Length; i++)
        bytes[i] ^= key;

    return Convert.ToBase64String(bytes);
}

public string simpleDecode(string data)
{
    byte key = 0x5A;

    byte[] bytes = Convert.FromBase64String(data);

    for (int i = 0; i < bytes.Length; i++)
        bytes[i] ^= key;

    return Encoding.UTF8.GetString(bytes);
}